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/******************************************************************************
*
* xc_memshr.c
*
* Interface to low-level memory sharing functionality.
*
* Copyright (c) 2009 Citrix Systems, Inc. (Grzegorz Milos)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xc_private.h"
#include <xen/memory.h>
#include <xen/grant_table.h>
int xc_memshr_control(xc_interface *xch,
domid_t domid,
int enable)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_CONTROL;
op->u.enable = enable;
return do_domctl(xch, &domctl);
}
int xc_memshr_nominate_gfn(xc_interface *xch,
domid_t domid,
unsigned long gfn,
uint64_t *handle)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
int ret;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GFN;
op->u.nominate.u.gfn = gfn;
ret = do_domctl(xch, &domctl);
if(!ret) *handle = op->u.nominate.handle;
return ret;
}
int xc_memshr_nominate_gref(xc_interface *xch,
domid_t domid,
grant_ref_t gref,
uint64_t *handle)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
int ret;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_NOMINATE_GREF;
op->u.nominate.u.grant_ref = gref;
ret = do_domctl(xch, &domctl);
if(!ret) *handle = op->u.nominate.handle;
return ret;
}
int xc_memshr_share(xc_interface *xch,
uint64_t source_handle,
uint64_t client_handle)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = 0;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_SHARE;
op->u.share.source_handle = source_handle;
op->u.share.client_handle = client_handle;
return do_domctl(xch, &domctl);
}
int xc_memshr_domain_resume(xc_interface *xch,
domid_t domid)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_RESUME;
return do_domctl(xch, &domctl);
}
int xc_memshr_debug_gfn(xc_interface *xch,
domid_t domid,
unsigned long gfn)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GFN;
op->u.debug.u.gfn = gfn;
return do_domctl(xch, &domctl);
}
int xc_memshr_debug_mfn(xc_interface *xch,
domid_t domid,
unsigned long mfn)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_MFN;
op->u.debug.u.mfn = mfn;
return do_domctl(xch, &domctl);
}
int xc_memshr_debug_gref(xc_interface *xch,
domid_t domid,
grant_ref_t gref)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_DEBUG_GREF;
op->u.debug.u.gref = gref;
return do_domctl(xch, &domctl);
}
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